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BULLETIN OF THE CHINESE CERAMIC SOCIETY ›› 2021, Vol. 40 ›› Issue (9): 2884-2890.

• Cement and Concrete • Previous Articles     Next Articles

Effect of F-S Mineralizer on Calcining Raw Materials with High Quartz Content

MAHESHATI Hansuoertan1, LU Puguang2, AI Hongmei3   

  1. 1. Xinjiang Irtysh River Basin Development Engineering Construction Administration, Urumqi 830000, China;
    2. Beifang Investigation, Design &Research Co. Ltd, Tianjin 300202, China;
    3. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2021-02-20 Revised:2021-06-07 Online:2021-09-15 Published:2021-10-08

Abstract: The all-components of waste concrete used in cement production can improve the utilization rate of construction waste, however, the quartz will be brought in raw material inevitably, and the burnability of raw material and the quality of clinkers can be affected. Different proportions of F-S mineralizer (m(F)/m(SO3)=0.4) were mixed in raw material in the experiment, the effect of F-S mineralizer on clinker property and burnability of raw material whose silicon materials were quartz sand was studied. The results show that while the F-S mineralizer is added in the raw material, the burnability of raw material is improved, it also lowers the temperature of liquid phase appeared and crystallization of C3S, hydration products of clinker is more compacted and compressive strength is higher than raw material. When the mass content of CaF2 of F-S mineralizer increases from 0.5% to 1.5%, the long slenderness ratio of C3S crystal becomes smaller, and the compressive strength of hydrated clinker decreases slightly.

Key words: waste concrete, quartz, raw material, F-S mineralizer, calcination, hydration

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